Drilling machine



2 Sheets-Sheet 2A Fild Jan. 11, 1925 man EL? vy: s.

Patented Feb. 8, 1927.

g Liana DRILLING MACHINE.

Application filed January' 11, 1923.' ASerial No. 611,9?6.

My invention pertains to iiuid pressure motors and relates particularly but not exclusively `to drilling machines and especially to machines for drilling rock.

5 My invention will be best understood from the following description when read in the light of the accompanying drawings of a specific embodiment of my invention selected v vfor illustrative purposes, while the scope of` my invention will be more particularly pointed out in the appended claims.

In the drawings i Fig. 1 represents a longitudinal section of a rock drill embodying my invention;

Fig. 2 is a section on the line 2 2 of Fig. 1 ot' the rearward portion of the rock drill;

` Figs. 3 and 4 respectively are sections on the lin-es 3 3 and 4-4 of Fig. 1; Y

Fig. 5 is-a section on the line 5 5 of Fig. 1 with the parts moved to another position for convenience of illustration;

Figs. 6, 7 and 8 are sections' corresponding to F ig. 5 with the parts moved into different positions;

Fig. 9 is a section on the line 9 9 of Fig. 2; and V Figs. 10 and 11 respectively are sections of the inner motor member on the lines 10 10 and 11 11 of Fig. 5.

Referring to the drawings 1 have shown a drill steel 1 the. shank 3 of' which is mounted in the chuck 5 in such manner that when the chuck rotates the drill steel must rotate with it. Rearwardly of the drill steel I provide a reciprocatory hammer piston which herein comprises the head 7, the forward extension 9,l and the rearward eXtension 11, the forward extension as shown being adapted to strike the end of the shank of the drill steel at the end of the forward stroke of the piston and the rearward eX- tension as shown being provided with the reduced diameterportion 12 near its juncture with the head.

The chuck and hammer piston are mounted in a casing 13 which is provided with a bore 15 for receiving the chuck and extension 9 of the piston. a bore 17 for receiving the extension 9 of the piston, a bore 19 for receiving the head 7 of the piston, and a bore' 21 for receiving the extension 11 of the piston. y

As is best shown in Fig. 2 the casing illus trated includes a section 23 which abuts the section having the bore 19,`the section 23 being provided with la bore 25 in which is permanently secured the. section 27 of the casing,- the latter section having the bore 21.

At the rearward'side of the section 23 the section 27 is provided with an exterior liange,

29. Rearwardly of the flange the exterior portion of the section 27 is squared as is illustrated in Fig. 4. Rearwardly of the squared portion the section 27 is provided with a cylindrical portion 30 o f-reduced diameter so as to form a shoulder 31, and is further reduced in diameter as indicated at 33 to afford the shoulder 35. y

. Upon the exterior of the portion of the section 27 received in the bore 25 of the section 23 are shown annular grooves 37, 39 and rcs.

41. With the groove 41 communicates the motive fluid supply passage 43 formed in the section 23 and leading from the motive `fluid supply connection 45, the passage being controlled bythe throttle valve 47. |Connecting the groove 41 rwith the bore 21 are the radial passages 49. Leading rearwardly from the radial passages 49 are the grooves 51 formed on the interior surface of the bore 21. Leading rearwardly from thepassages 49 in such positio-n as to intersect the grooves 51 are the passages 53 `which open into the bore 21 at its extreme rearward end by way of the annular; groove 55 formed as an enlargement of the bore 21 and intersecting the passages 53. Placing the groove 39 in communication with the bore 21 are the radial passages 57, and leading from the groove 39 to the forwardend of the bore 19 are the pas-` sages 59. At the central portion of the bore 19 is formed an enlargement 61 which is placed in communica-tion with the exhaust nozzle 63 of the machine by a passage 65. -A

Vhen the throttle valve 47 is placed in. the position shown by Fig. 2 motive fluid may pass from the source of the motive fluid sup ply to the vgroove 41, whence it passesjby means of the grooves 51, passages 53 and groove 55 to the rearward end of the bore 21 so as to maintain a continuous pressure the passages 49 to the forward end of the bore A 19 by way of the passages 57, groove 39 and vpassages 59. The rearward side of the head y 7 at this time uncovers the enlargement 61, and as a consequence the pistonymoves rearwardly. 'When it reaches the rearward'por# tion of 'its stroke the reduced'portion 12 of vthe extension 11 establishes communication` ward side of the head 7 and upon the rearward end of the extension 11.

As the specific details of the piston and means for causing it to reciprocate do not form part of my present invention the same will not be further described.

As is best shown by Fig. 5 the squared portion of the member 27 lying between the flange 29 and shoulder 31 provides oppositely .disposed flat surfaces 67. Mounted for .reciprocation upon these flat surfaces is shownkthe ring like motor member 69 which surrounds the casing sect-lon 27. Surround- I. ing the ring like member is shown a second motor member or yoke 71 which has interior flatsides 73 at right angles to the flat sides 67, so that the member 71 may reciprocate -upon the member 69. The member 71herein is lsupported upon' eccentrics 75 which are carried upon rotatable shafts 77 positioned in the same plane equidistant from the aXis of the piston and chuck. It will bethus noted that if the eccentrics rotate in phase the member 71 willpartake of an orbital movement about the axis of the piston and chuck, thediameter of the orbitbeing equal to twice the eccentricity ofthe eccentrics.

,Hereim as best shown in Fig. 2, about the motorV members 69 and 71, I place the ycasing section 79 which has an interior flange S1 vfitting the periphery of the flange 29 of the casing section 27 both flanges being of the The flanges of the member 69 serve to pre' ysaine thickness. Upon the portion 30 of the casing .section 27 T I place the casing section 82. The rearward sides of the motor members 69 and 71 bear against the forward face 83 of the casing section `S1, while the motor member 69 is provided with a flange 85 which bears against the rearward faces `89. of the flanges 81 and 29.' The ymotor ymember 71 is of such dimension that it lits the wall 83 and the rearwardl face of the flange 85.

,As isbest shown in Figs. 1 and 4L, herein the flange 81 of the casing section 79 is bored out to receive the bearing blocks 91 which are flattened as indicated at 93 in Fig. f1 toy fitI the flattened portions 95 of the flange 29. Thus the bearing block is preventedfrom rotating and serves to dowel the parts together.

vent motive fluid from leakingV out of the spaces between the motor members around the joints between the flanges 81 and 29 and bearing blocks 91 when said motive fluid is admitted to operate the rmotor member in a manner hereinafter described.

As illustrated, upon the portion 30 of the casing section 27 is rotatably mounted the gear 977 best shown`4 in Fig. 9, and in mesh therewith are the gears 99 vcarried by the shafts 77 the gears 97 and 99 causing the shafts to rot-ate in unison. The casing section 32 is recessed to receive the gears as is indicated at 100 in Fig. 9. Mounted upon the portion 33 of the casing section 27 is the sleeve-like section 101 of the casingthe section 101 havingy a flange 103 lwhich is received in a recess 105 in the .casing section 82 to cause the section 101to close the recess 100. Mounted upon and permanently sefcuredto the section 101' is Jhe casing section 107 which is provided with the interior annular groove 109. The section 101 and casing section 107 are held in position by the plug'110 which is lscrew threadedly received in the socket 111 formed' in the rearwardv end of the casing section .27. The plug serves to hold the casing sections 79, 82 and 107, andr consequently ythe motor, in assembled relation upon the cas-l ing sections'23 andf27 which are permanently secured to each other, so that the mo-v tor may be removed asa unit from the rest of the machine, `the shafts 77 for this purpose being in two sections detachably splined together as is indicated at 112'in Fig. 1 which figure shows one section provided with an end of square cross-section fitting into a socket of similar cross-section in the adjacent end of the other section.` All the parts are held in assembled relation by means of the four side bolts 113.

The groove 109 is shown as connected with a source of motive fluid supply by way of the passage 115 which is controlled by the throttle valve 117. As illustrated by Figs. 2 and 9, from the passage 115 between the throttle valve and groove 109 rleads a plurality of similar passages 119 nio respectively connect the rearward face of As indicated by Figs. 2 and 5 they i This Win aiter- 1 the passages 121and 1-25 are in communilation, and this will cause downward movement of 4the motor member 71. When `the motor member 71 approachesthe extreme downward limit of its stroke the passage 123 is brought into communication with the passage 119, and this admits motive flui'd to cause the motorfmembei' 71 to travel to the upper limit of its stroke.

For exhausting the motive fluid admitted to the spaces between the motor members 69 and 71 the latter herein is provided with the passages 127 which connect the interior ot' said member to the interior of the/casing 79. rThe motor member 69 is provided at its corners with notches 128 which are alternately overrun by the inner ends of the passages 127 as the motor member reciprocates relatively to the motor member 69. In the position ot parts shown by Figx the upper passage 127 is in communication with the upper notch 128 and consequently the vupper space is exhausted, and with the parts moved to the position shown by Fig.

` 7 the lower passage 127 is'in communication wilh'the lower notch 128 and consequently the lower space is exhausted.

For admitting motive fluid to the spaces between the casing section 27 and the m'otor member 69 I herein provide a passage 129 which opens into the groove 109 by means of an intersecting passage' 131 and has connected therewith a passage 133 opening ony the lower liati side 67 of the casing member 27 as viewed in Fig. 5. As shown by Figs. 5 and 11 the surface of the motor member 69 in contact with theupper sur-- face 67 asV viewed in Fig; -5 is provided with grooves 135 which are adapted to alternately establish communication between the pas` sage 133 and the spaces between the casin-g section 27 and the motor member 69. In thc position of parts shown by Fig. 6 the left hand space is supplied with motive fluid, and in the position shown-by Fig. 8 the rightl hand space is supplied with motive fluid. For controlling the exhaust of the motive fluid acting to reciprocate the motor member 69 I provide a passage 137 which establishes communication between the vgroove 37 and the passage' 139 o pening on the upper fiat side 67 of the casing section 27 as viewed in Fig. 5. Opposite the passage 69 the motor member 9 is provide-d with the grooves 141 which have the otset portions 143 adapted when the motor member 69 is reciprocated to be alternately brought into registry with the end of the passage 139. With the parts in the position shown by Fig. 6 'the right hand space is connected to the passage 139-.hand when moved to the posit-ion shown by Fig'. 8 the left hand space is connected to this passage. The groove `37 is placedl in communication with the atmosphere by way of a passage 145 communicating withthe exhaust nozzle 63. Also the interior of the casing section 79 i-s vented `by means of ka passage 146 in communica-tion with the groove 37.

The shafts 77 as shown at their forward ends have integrally formed therewith the oppositely disposed eccentrics 147. Upon the similarly disposed eccentrics are mounted yo'kes 149, the latter being provided with internal gear teeth 151 to mesh with gear teeth 155 upon the chuck.- It will be'understood by this that they orbital vmotion of the member 71 is imparted to the shafts which in turn impart the motion to the chuck through the reduction gearing afforded by the yokes 149 in mesh with the chuck. Although the eccentrics 147 for driving the yoke may be ofthe saine ee'centricity as the eccentrics 75 associated with the motor,`preferably those for driving the yoke are of smaller eccentricity, which enables the provision of a powerful and .more eflicient motor while maintaining a largegear reduction. i

Although I have described tor purposes of illustration one specific embodiment of my invention it li-s to be understood that within the scope of my invention wide deviations may be made therefrom without departing from the spirit of my invention.

Claims:

f1. In a ro'ck drill, a chuck formed .for carrying a drilll steel, a piston .for operating Said vdrill steel, a casing for said chuck and piston, said casing having a portion slidably7 supporting `an inner motormember, an outer motor member slidably supported on said inner motor member, means supporting said outer motor member for orbital movement, means for transmitting said orbital movement to said chuck, and means for permitting motive fluid to act upon said motorv members for causing said orbital motion.

2. In a rock drill, a chuck formedr for carrying a drill steel, a `hammer piston for operating said drill steel, said chuck having gear teeth thereon, eccentrics at the side of said chuck, a yoke supported on said eccentrics, said yoke surrounding said chuck and having gear teeth in mesh with. said gear teeth of said chuck, other eccentrica aligned with the eccentrics first mentioned and rotating therewith, a motor member supported on said secondinentioned eccentrics, and means for permitting motive fluid to act interiorly of said motor member for causing rotation of said eccentrics.

3. In a drilling machine, a chuck, a moto-r member, means mounting` said member for orbital movement and for operatively connecting it to said chuck for rotating the latter, and means permitting mot-ive Huid to act upon saidv motor member interiorly thereof for causing its orbital movement.

4; In a drilling machine, a chuck, a mopartsV surrounding one of said members,

ltor operating said drill steel, a casing tor membermounted for orbital movement member and a chuck member, the latter formed for `carrying a drill st-eel operated by the former, a ymotor for driving vsaid chuck, said motor having three substantiallyI annular parts, one of which is stationary and the others of which are-movable, one ot said movable partssliding uponl the stationary part and the other -movable part sliding upon the first mentioned movable part, said means for admitting'andexhausting motive Huid for actuating said movable parts,.means` driven by;` one of said movable parts, said means being 'connected in driving relation to saidl chuck i and causing said part which `drives it to partake of an orbital movement.

6. In a drilling machine, a chuck, a casing for said machine, a member surrounding a portion `oit said casing, means mounting said member for orbitalV movement, and means permitting motive fluid to act between said member and the portion of the casing which it surrounds for giving said member its orbital movement.

7. In a drilling machine, a chuck formed for carrying a drill steel, a hammer piston for said hammer piston, amember surrounding a portion of said casing, meansmounting said member for orbital movement, means perinittintfg-` motive fluid to act between'said member and the portion of the casing Which it'surrounds orgivingsaid member its orbi` tal movement-,said last mentioned means including an `inner member slidably mounted onsaidportionfot said casing and said lirstmentioned member. w

' 8. In a rock drill, a chuck formed for carrying a drilly steel, a piston for 'operating said drill steel, a casing for said chuck and piston, said casing having a portion surrounded by and slidably supporting an inner motor i'ncin.bei,7an outer motor meinber slidably supported on said inner motor member, means supportingsaid outer motor member for orbital movement, means foi" transmitting said orbital movement of .said outer motor member to said chuck, and means for permitting` motive liuidV to act between said motor members for causing lsaid .orbital motion.

9. In a rock drill, a chuck formed tor carrying a drill steel, apist'on tor operating said drill steel, a casing 'for said chuck and piston, rounded by and slidably supporting an inner motor member, an outer motor inem- `ber slidably supported on said inner motor said casing having a portion sur-y member, means supporting said outer motor member-*for orbital movement, means for transmitting said orbital movement of said 'outer motor member u) said chuck, and means for permitting motive Huid to act between said casing and inner motor member for causing said orbital motion.

l0. In a rock drill, va piston having an extension, a chuck formed for carrying a drill'steel operated by said piston, a motor surrounding said extension, said motor comprising a stationary member and tWo movable members ally nested together, means supporting one of said movable members for orbital movement, and motion transmitting means independent of said means supporting said member for orbital movement, said reduction gearing including reduction gearing'operated by said orbital movement for rotating said chuck.

11. Ina rock drill, a piston having a rearward extension, a chuck formed Jfor carrying a drill steel operated by said piston, a motor surrounding lsaid extension, said motor comprising a stationary meinbei'l and two movable members all nested together, said stationary member having a bore forming a cylinder Wall for the rearward extension of said'piston, `means supporting one of said movable members for or-v motor comprising a` stationary member and two movable members all nested together, means supporting one of said movable meinbers for orbital movement, and motion ioo transmitting means operated by said orbital movement for rotating said chuck.

13. In a rock drill, a chuck ormed Afor carrying a drill steel, a hammer piston for operating said drill steel, said hammer` piston having a head and a rearward eX- teiision, a casing' having boresfor said chuck and the head and rearward extension of said piston, the porti-on of said casing having the bore for saidrearward extension being formed exteriorly thereof with two oppositely disposed llat sides, a ring surrounding said portion and beingslidably mounted upon said tlat sideasaid ring having flat sides on its exterior disposed trans-- versely to the llat sides ot said portion of said casing, a member surrounding said ring and being slidably mounted upon the exterior flat sides of said ring, said last named member being supported upon spaced eccentrics mounted Ion separate shafts, means tor causing said shafts to vrotate in unison and for imparting lsaid rotation to said chuck. v

Cil

14. In a rock drill, a piston having a rearward extension, a casing for said extension having an exterior portion of substantially square cross-section, a ring like member mounted upon said exterior portion of said casing for reciprocation transversely thereto, a second' member mounted upon said ring like member for reciprocation transversely to the reciprocation of said ring like member, a chuck, and means operatively connecting said chuck to said second member.

15. In a rock drill, a chuck formed for carrying a. drill steel, a piston for operating said drill steel, a casing for said chuck and piston, sai-d casing having a portion surrounded by and slidably supporting an inner motor member, an outer motor member slidably supported on said inner motor member, means supporting said outer motor member for orbital movement, means for transmitting said orbital movement of said outer motor member to said chuck, and ports directly controlled by said members for admitting motive fluid to act upon said mem-- bers for causing said orbital motion.

16. A fluid pressure motor having a central stationary portion provided exteriorly thereof with oppositely disposed flat sides, a member surrounding said stationaryv portion and having an interior bearing upon said fiat sides, said member having exteriorly thereof oppositely disposed flat sides at right angles to the llat sides of said stationary portion, a second member surrounding said first mentioned member and having an interior bearing upon the exterior flat sides of said first member, means supporting said second member for orbital movement, and means for permitting motive fluid to act upon said members for causing said orbital movement.

17. A fluid pressure motor havingka central stationary port-ion provided exteriorly thereof with oppositely disposed flat sides, a member surrounding said stationary portion and having an interior bearing upon said flat sides, said member having exteriorly thereof oppositely disposed flat sides at right angles to the flat sides of said stationary portion, asecond member surrounding said first mentioned member and having an interior bearing upon the exterior flat sides of said first member, ecc-ent-rics supporting one of said members, means for causing said eccentrics to rotate in unison, and means permitting motive fluid to act upon said member supported by said eccentrics for causing it to rotate said eccentrics.

18. In a rock drill, a chuck, a casing, a gyratory yoke at the forward end of said casing, a gyratory yoke atvthe rearward end of said casing, means enforcing conjoint movement of said yokes, a ypiston having a rearward extension of reduced diameter resaid chuck; a casing for said chuck,

casing for causing. said conjoint n iovement 19. In a rock drill, a piston having a rea-rward extension of reduced diameter', a chuck,

chuck and piston, the portion of said casing receiving said extension of said piston being exteriorly reduced, a gyratory member surrounding said portion of said Casing, means for permitting motive fluid to act upon said gyratory member for operating it, and reduction gearing for transmitting mot-ion of said gyratory member t-o said chuck. l

20. In a drilling machine, a chuck having external gear teeth, a gyratory member surrounding said chuck and having internal gear teeth meshing with the gear teeth onsaid chuck,. a secondA gyratory member mounted rearwardly of said'chuck, means enforcing conjoint movement of said gyrative fluid to act upon said second gyratory member for causing said conjoint movement.

i 21. In a drilling machine, a chuck having external gear teeth, a gyratory member surrounding said chuck and having internal gear teeth meshing with the gear teeth on said chuck, a second gyratory member mounted rearwardly of said chuck, a casing said expansible chamber for operating said second gyratory member.

22. In a rock drill; a chuck; a piston for operating a drill steel carried by said chuck; a motor for rotating said chuck; a sha-ft for transmitting the motion of said motor to motor and shaft, said casing being in sections; and said shaft having sections removably splined to each other for permitting the part of said casing for said motor to be removed from the remainder of said casing without disassembling said motor.

23. In a rock drill, a chuck,a motor comprising nested transversely reciprocating members, -an eccentric driven by one of said members, a second eccentric driven by the first mentioned eccentric and being of lesser eccentricity, and a gyratory gear operatively connected to said chuck and driven by said second eccentric.

a drill steel carried by said chuck and, operated by said piston, a casing for said piston,

' tory members, and means for permitting mollO ' 24. In a rock drill, a chuck, a motor comprising nested transversely reciprocating members, an eccentric driven by one of said members, a shaft carrying said eccentric, an

25. Ina rock drill, a chuck, a motor com- 10 prising nested transversely reciprocating members, a pair of eccentrics driven by one of said members, a shaft for each eccentric of said pair, said shafts each carrying` an eccentric of lesser eccentricity, and a gyratory gear in driving relation to said chuck and driven by said eccentrics of lesser eccentricity. y

In testimony whereof, I ,have signed my name to this specification,

GEORGE n, Gini/IAN. 

